Perry Scientific specializes in preclinical animal studies and offers a complete range of services, animal models and surgical techniques. Services include most types of "in vivo" studies, including oncology and toxicology models, as well as large animal and device studies. Tissue culture, cell culture and antibody production services are also available. Vivarium services for small and large animals provide leased animal and procedure rooms to biotech companies on a short- or long-term basis. Routinely evaluated animal models include subcutaneous xenograft models, syngenic models, angiogenesis models, mammary fat pad models, and custom model development. Rodent models include nude mice (human xenografts), SCID mice (human xenografts), normal mice (syngenic tumors), immunodeficient rats (human xenografts), and normal rats (syngenic tumors). Toxicology screening studies provide preliminary assessment of drug safety.